Mileage Log for Taxes: What the IRS Requires in 2026
If you drive for work — real estate showings, freelance client visits, deliveries, side gigs — your car is quietly generating one of the biggest tax deductions available to you. At 76 cents a mile, even 10,000 business miles is a $7,600 deduction. But the IRS does not take your word for it.
To claim the mileage deduction, you need a mileage log: a contemporaneous record of your business driving. "Contemporaneous" is the key word — a log reconstructed from memory in April is exactly what gets deductions disallowed. This guide covers what the IRS actually requires, the 2026 standard rate, whether an app or spreadsheet serves you better, and the five-minute habit that makes the whole thing automatic.
Note: this is general information about record-keeping, not tax advice. Talk to a tax professional about your situation.
The four things the IRS requires in your log
The IRS is specific about what counts as adequate records for vehicle deductions. Every business trip in your log needs these four elements:
| Element | What to record | Example |
|---|---|---|
| Date | The day of the trip | 2026-03-14 |
| Destination | Where you went — specific enough to verify | Client office, 400 Main St |
| Business purpose | Why the trip was business | Listing presentation with buyers |
| Miles driven | Trip distance (odometer readings optional but smart) | 23.4 miles |
That is the complete requirement. You do not need gas receipts for the standard mileage method, you do not need a GPS track — you need those four facts, recorded near the time of the trip, for every business drive. A simple spreadsheet row per trip satisfies this fully, which is why so many self-employed filers prefer it over yet another subscription app.
The 2026 standard mileage rate
Each year the IRS sets a standard rate per business mile. For 2026, the rates are:
- Business driving: 76 cents per mile. This is the big one — client visits, showings, supply runs, gig work.
- Medical driving: 23.5 cents per mile. Trips for medical care.
- Charitable driving: 14 cents per mile. Volunteer work (set by statute, rarely changes).
Do the math on your own driving before you dismiss it: 12,000 business miles × $0.76 = $9,120 in deductions. In a 22% bracket, that is about $2,000 less tax. The log is the only thing standing between you and that money.
One critical boundary: commuting is not deductible. Driving from home to your regular workplace does not count, even if you work for yourself with a home office in some interpretations. Log the business legs of your day — the trips between work locations, to clients, to the supply store — and leave the commute out. A good log template excludes commute trips automatically.
App vs. spreadsheet: an honest comparison
| Mileage app | Spreadsheet log | |
|---|---|---|
| Effort per trip | Low — GPS auto-tracks | Low — one row, ~30 seconds |
| Cost | $5–15/month typical | One-time or free |
| Accuracy | Can misclassify trips; GPS drift | Exact — you write what happened |
| Audit trail | Exportable reports | The log itself, plus a printable summary |
| Privacy | Your location, on their servers | Your file, your computer |
| Best for | Very high trip volume (50+/week) | Everyone else |
Apps win on pure volume. But for most freelancers, realtors, and gig workers doing a handful of trips a day, a spreadsheet is cheaper, more private, and — because you consciously record the business purpose each time — often more accurate. The best tool is the one you will actually maintain; a $10/month app you ignore logs nothing.
The five-minute daily habit
Reconstructed logs fail; daily logs survive. Make it frictionless:
- Keep the log where the driving ends. Phone home-screen shortcut, a notebook in the console, or the spreadsheet open on your work computer — wherever you will see it when you park.
- Log at day's end, not trip by trip. Two minutes recalling today's drives beats interrupting every stop. Same-day recall is "contemporaneous" enough.
- Use shorthand. "Show 123 Oak — buyers" is a complete entry. You are recording facts, not writing a diary.
- Photograph the odometer monthly. A monthly odometer photo corroborates your totals and takes ten seconds. Auditors love corroboration.
- Review weekly (5 min). Fill any gaps while the week is fresh, and watch your running deduction total grow — motivation and accuracy in one.
If you are self-employed, your mileage log also feeds directly into your bigger tax picture — it belongs next to your Schedule C deduction checklist and your freelancer income records at tax time.
Frequently asked questions
Do I need odometer readings for every trip?
No — the IRS requires date, destination, business purpose, and miles. Odometer readings are not strictly required, but recording start/end readings (or a monthly photo) strengthens your records if you are ever questioned. Cheap insurance.
I forgot to log for months. Can I reconstruct it?
You can try: calendar appointments, client invoices, and emails can rebuild trip dates and destinations. But be honest with yourself and your preparer about what is reconstructed — and start the daily habit today so next year is clean.
Can I deduct driving to a second job or gig?
Often yes — travel between work locations during the day is generally deductible business mileage. The non-deductible part is the regular commute from home to your first work location. Rules have nuances (especially with a home office), so confirm with a tax pro.
Standard mileage or actual expenses — which is better?
Standard mileage (76¢/mile) is simpler and usually wins for typical cars. Actual expenses (gas, insurance, depreciation × business-use %) can win for expensive vehicles or very high mileage. You must choose in the first year you use the car for business — another reason to talk to a professional early.
Stop guessing at tax time
Browse the 0ne1stack collection — planners, trackers, and spreadsheets built to make record-keeping automatic, including tools for mileage, deductions, and invoicing.
Browse the 0ne1stack CollectionRelated guides
- Schedule C Deductions Checklist — every deduction category self-employed filers should review.
- Freelancer Invoice Tracker — get paid on time and keep income records clean.